Abstract
Grain filling is the final determinant of yield, and this process is susceptible to abiotic stresses. Salicylic acid (SA) regulates grain filling in rice plants. A comparative proteomic study was conducted to understand how SA mediates grain filling under soil drying (SD) condition. Zhefu802 and its near-isogenic line (NIL) were planted in pots in an artificial chamber. SA (100 mg L−1) was applied, followed by SD treatment (with a water potential of −30 to −35 kPa) at anthesis. The results showed that the grain yield and grain weight significantly decreased under SD in Zhefu802, but not in its NIL variety. SD also decreased expression of photosynthesis-related proteins in grains of Zhefu802, which resulted in its poorer drought resistance. Furthermore, the decreased grain filling rate rather than the grain size explained the observed decreased grain weight and grain yield under SD. Interestingly, these reductions were reversed by SA. Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA. The expression of these proteins was examined at transcriptional level and similar results were obtained. Inhibited expression of these proteins and related pathways contributed to the observed decrease in the grain filling rate of Zhefu802, and application of SA up-regulated expression of these proteins to improve grain weight. The findings of this study provide new insights into grain filling regulation by SA, and offer the scientific foundation for cultivation practice.
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Claims 14
Claim · model-written summary
SD significantly decreased grain yield and grain weight in Zhefu802 in a pot experiment
- Taxon
- rice (Oryza sativa L.)
Oryza sativat0 - Material
- Zhefu802e1
- Treatment
- SDe1
- Outcome
- grain yield and grain weighte1
- Direction
- decreasede1
- Setting
- artificial chambere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e0“Zhefu802 and its near-isogenic line (NIL) were planted in pots in an artificial chamber”
e1“The results showed that the grain yield and grain weight significantly decreased under SD in Zhefu802, but not in its NIL variety”
Claim · model-written summary
Grain yield and grain weight of the NIL variety were not reduced by SD, unlike Zhefu802
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- NIL varietye1
- Treatment
- SDe1
- Outcome
- grain yield and grain weighte1
- Direction
- no_changeinferrede1
- Comparator
- Zhefu802e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e1“The results showed that the grain yield and grain weight significantly decreased under SD in Zhefu802, but not in its NIL variety”
Claim · model-written summary
SA reversed the SD-induced reductions in grain yield and grain weight
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SAe4
- Outcome
- reductionse4
- Direction
- reversede4
- Comparator
- SDe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e1“The results showed that the grain yield and grain weight significantly decreased under SD in Zhefu802, but not in its NIL variety”
e4“Interestingly, these reductions were reversed by SA”
Claim · model-written summary
SD decreased expression of photosynthesis-related proteins in grains of Zhefu802
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- Zhefu802e2
- Organ / stage
- grainse2
- Treatment
- SDe2
- Gene
- photosynthesis-related proteinse2
- Outcome
- expression of photosynthesis-related proteinse2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e2“SD also decreased expression of photosynthesis-related proteins in grains of Zhefu802, which resulted in its poorer drought resistance”
Claim · model-written summary
A decreased grain filling rate, rather than grain size, explained the decreased grain weight and grain yield under SD
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SDe3
- Outcome
- grain filling ratee3
- Direction
- decreasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e3“Furthermore, the decreased grain filling rate rather than the grain size explained the observed decreased grain weight and grain yield under SD”
Claim · model-written summary
SD down-regulated proteins of glycolysis/TCA cycle, starch and sucrose metabolism, and antioxidation and detoxication
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SDe5
- Outcome
- glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxicatione5
- Direction
- down-regulatede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e5“Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA”
Claim · model-written summary
SD down-regulated proteins of oxidative phosphorylation, transcription and translation
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SDe5
- Outcome
- oxidative phosphorylation, transcription, translatione5
- Direction
- down-regulatede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e5“Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA”
Claim · model-written summary
SD down-regulated proteins involved in signal transduction
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SDe5
- Outcome
- signal transductione5
- Direction
- down-regulatede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e5“Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA”
Claim · model-written summary
SA up-regulated proteins of glycolysis/TCA cycle, starch and sucrose metabolism, and antioxidation and detoxication relative to SD
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SAe5
- Outcome
- glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxicatione5
- Direction
- up-regulatede5
- Comparator
- SDe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e5“Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA”
Claim · model-written summary
SA up-regulated proteins of oxidative phosphorylation, transcription and translation relative to SD
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SAe5
- Outcome
- oxidative phosphorylation, transcription, translatione5
- Direction
- up-regulatede5
- Comparator
- SDe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e5“Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA”
Claim · model-written summary
SA up-regulated proteins involved in signal transduction relative to SD
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SAe5
- Outcome
- signal transductione5
- Direction
- up-regulatede5
- Comparator
- SDe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e5“Expression of proteins involved in glycolysis/TCA circle, starch and sucrose metabolism, antioxidation and detoxication, oxidative phosphorylation, transcription, translation, and signal transduction, were significantly down-regulated under SD and were significantly up-regulated in response to SA”
Claim · model-written summary
Transcript-level examination of these proteins gave similar results
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Outcome
- transcriptional levele6
- Qualifier
- similar results were obtainede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e6“The expression of these proteins was examined at transcriptional level and similar results were obtained”
Claim · model-written summary
Inhibited expression of these proteins and related pathways contributed to the decreased grain filling rate of Zhefu802
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Material
- Zhefu802e7
- Outcome
- grain filling ratee7
- Qualifier
- Inhibited expression of these proteins and related pathwayse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e7“Inhibited expression of these proteins and related pathways contributed to the observed decrease in the grain filling rate of Zhefu802, and application of SA up-regulated expression of these proteins to improve grain weight”
Claim · model-written summary
SA up-regulated expression of these proteins to improve grain weight
- Taxon
- rice (Oryza sativa L.)Oryza sativat0
- Treatment
- SAe7
- Outcome
- grain weighte7
- Direction
- improvee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Proteomic analysis of salicylic acid regulation of grain filling of two near-isogenic rice (Oryza sativa L.) varieties under soil drying condition”
e7“Inhibited expression of these proteins and related pathways contributed to the observed decrease in the grain filling rate of Zhefu802, and application of SA up-regulated expression of these proteins to improve grain weight”
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